Intelligent Transportation System In The Gps Positioning Data Compensation Method

Near these decades, the state with tense traffic is aggravated constantly with the swift and violent development of global economy. ITS (Intelligent Traffic System), as a kind of brand-new way which Solves the traffic problem, is developing rapidly at home an abroad. Developing intelligent traffic already write into the integrated traffic system development plan in "the tenth Five-Year plan" of our country. The vehicle monitoring system is the important part of ITS, and is one of the focuses of the development and application of domestic ITS at present. The vehicle monitoring system designed id this thesis is made up of the terminal vehicle carries, attempter system in locale, center monitor system and manage system in the background.GPS (Global Positioning System) is the base part in the field of intelligent traffic system, its precision and continuity is the key of the succeed of the ITS. The intelligent public traffic system of Hisense is the background of this thesis. The thesis discusses the method to retrieve the GPS data when the GPS signal is disappear, using conic-fitting with the principle of least-squares, in the intelligent public traffic system. In this thesis, the writer generally introduces the principle of least-squares and introduces the design of the system, the design and achieves arithmetic of the least-squares particularly. In this thesis, the writer build a curve model aimed at the line of the bus running, start by the analysis of the GPS's shortcoming, finding the feather of the public traffic system and using the principle of the least-squares and the conic-fitting method. The model is used when the GPS signal disappear and get good result.